Gang-saw mill



(No Model.)

5 Sheets-Sheet 1.

DLCYRANVE. GANG SAW MILL.

Patented June 16, 1896.

5 Sheets-Sheet 2.

(No Model.) I

D. CRANE.

' GANG SAW MILL. No. 562,217. Patented June 16, 1896.

ANDREW BYGRAMAM. PHDTO-LITHQWASHINGTON. D C.

(No Model.) 5 Sheets-$heet 3.

D. CRANE. GANG SAW MILL.

No. 562,217. PatentedJune 16, 1896.

4 t e e h S m e nu h S 5 m ET. NM W RA S m A G (No Model.)

No. 562,217. Patented June 16, 1896.

(No Model.) 5 SheetsSheet 5.

D. CRANE.

GANG SAW MILL. No. 562,217. Patented June 16, 1896.

Wibwesses MORE!!! lfiRAMAM. RHOfO-LrmQWASmNGrONJE 2 parts of the machine.

5 frame of machine.

UNITED STATES PATENT OFFICE.

DANIEL CRANE, OF SAGINA\V, MICHIGAN.

GANG-SAW M ILL.

SPECIFICATION forming part of Letters I atent No. 562,217, dated June 16, 1896.

Application filed November 12, 1895. Serial No. 568,698. (No model.)

: To all whom it may concern.-

Be it known that I, DANIEL CRANE, a'citizen of the United States, residing at Saginaw, in the county of Saginaw and State of Michi- 5 gan, have invented certain new and useful 0nd, a variable overhang or rake to saws,

and, third, a variable feed, all with one combination-lever which operates the whole, giving the saws the same contact with the timber, from the smallest to the greatest feed.

I attain these objects by the mechanism illustrated in the drawings, in which Figure 1 is a plan of the machine. Fig. 2 is a front elevation of the machine; Fig. 3, a sectional elevation showing the oscillating Fig. 4 is an outside elevation showing mechanism for operating oscillation and feed. Fig. 5 is a horizontal section through the combination-pulley I.

The saw-gate reciprocates as usual in slides,

of which the upper ones are fixed, while the lower slides A A are pendulous by being secured to the arms B B, by means of the swingpins a a. The arms B B are secured to a shaft D,which has its bearings secured to main The shaft D (see Figs. 1 and 4) is also provided with the quadrant-arm E and a lifting-arm F. The quadrant-arm E engages with a worm G, mounted on a strong spindle G, (see Fig. 2,) which preferably is supportedin pivot-bearings and near its lower end has the bevel gear-wheel G This bevel gear-wheel G meshes with a bevel-pinion G upon a shaft G (see Figs. 1, 2 and 4,) which passes through a hollow rock-shaft II and 5 carries a sprocket-chain wheel Z) on its outer end. The sprocket-wheel h is connected by link belt or chain 1) to a smaller sprocket-chain wheel d, which is provided with a shaft 01, on the opposite end of which is a small paper fric- 5o tion-whee1 f. This shaft d (with sprocketchain wheel and paper friction-wheel) has its bearing in the end of an extension-arm h,

formed in the hollow rock-shaft I-I. (See Figs. 1, 2 and 4.) The paper friction-wheel f projects into an annular recess of the combination-pulley I, (see Figs. 2 and 4,) which is so constructed as to form a pulley for receiving power by belt from gang-shaft or countershaft, also a face-plate for the variable-feed and opposite annular friction-surfaces for the small paper friction-wheel J.

J is a rocker-base which has its bearings in the small brackets 71 i, (see Figs. 1, 2 and 4,) which are secured to the frame-bracket K, which in turn is secured to main frame of gang. To this rocker-base J is attached the combination-lever L, Figs. 1, 2 and 4, to the side of which is attached the small shaft M, the upper end of which is provided with the lever-handle N, Figs. 1, 2 and 4, while its lower end passes through the rocker-base J and carries the small eccentric 0, Fig. 2, havside of rocker-base J and through the end of lever B, Figs. 1 and 4, and carrying upon its outer end the spring S, Figs. 1, 2 and 4. The lever L has a suitable latching device provided with the handle-lever L for holding it in its normal position.

The lifting-arm, Figs. 1, 2, and 4, has at tached to its outer end a sliding rod T, Figs. 2 and 4, which has a bracket T, that forms I the hearing which carries the edge frictionwheel U, Figs. 1 and 2. The rocker-base J has also a short arm V, Figs. 2 and 4, which is connected to the extension-arm h, Figs. 1, 2, and 4, by the connecting-link W. A vibrating motion is imparted to the slides Ain the usual manner by means of a rock-shaft X, which is actuated from the main shaft through any suitable connection and by a crank and pitman is connected to the lower ends of the slides.

In practice, the parts being constructed and arranged as shown and described, itwill be seen that if the operator grasps the lever L and closes the hand over the latch to unlock the same, the lever is free to be forced mitted through thechain-gear b and cl to. the shaft G which passes through the hollow rock-shaft H and gears with the spindle G, which carries the worm G". Now if the worm G is revolving in the proper direction the quadrant-arm E will be raised' and the arms B B, which carry the vibrating slides A A, will be raised with it and carried back, as

shown in dotted lines in Fig. 3, giving the saws more overhang or rake. Simultaneously with the raising of the slides A A, which increases the rake, the throw or vibrations of the slides has also increased, as the slideblock Y now reciprocates in the slides in closer proximity to the connection with the actuati'ng-pitman. Again, when the quadrant-arm E is raised the lifting-arm F, to which is attached the edge friction-wheel U, is also raised to the position shown by dotted lines in Fig. 2, giving an increase of feed simultaneouslywith the increase of throw and overhang or rake.

WVhen the lever L is forced in the opposite direction, the feed, the throw, and the overhang or rake are simultaneously diminished. It will also be seen that the above conditions are controlled perfectly by the one combinaition-wheel I adapted to be drawn periphertion-lever L.

The. object of the small shaft M, attached to the combination-lever L, which has the small lever N on its upper end and small eccentric O 011 its lower end,.is to start and stop the feed, as the lever Ris suitably connected to the combination-pulley Ito throw it in or out of contact with the feed-wheel U.

The position of small lever N in Fig. 1 shows feed on, and when thrown back, as shown bydottcd lines, the feed is off.

Power is transmitted to the feed-rolls (over which. the timber to be sawed passes) from Jrocker-base I and the combination-lever L the edge friction-wheel U by'the gearing'long in use in such machines.

I am aware that prior to m yinvention gangs have been, madevwith oscillation operated in conjunction with the feed. I therefore do not claim such a combination broadly,, but I am not aware that the rake of the saws, the amountof'throw and the rate of feed have ever been adjusted simultaneously by the operation of one lever, which is an important improvement and which makes it practical to. use the very thinnest saws, by distribut ing the wear more uniformly on the teethfor the entire length of the saws in contact with the timber, thereby enablingthe saws to remain sharp longer, with a result of less wear on saws and loss of time fitting same,.at the same time putting the machine under perfeet control of the operator, (by the one lever,) enabling him to advance or retard the movement of timber being sawed according to its resistance to the saws, the same as is the case with circular or band saws.

hat I claim as my invention is 1 rolls, substantially asdescribed.

1. The combination in a gang-saw mill of l the lower oscillating slidesA A, the rock-arms gages, actuating connection for said worm for imparting motion thereto at will in reverse directions, the lifting-arm F secured to shaft D and means operated by said arm for controlling the rate of feed, all substantially as i set forth.

2. In a gang-saw mill, the combination with the feed mechanism and fixed upper slideways, of lower oscillatory slideways, rockarms on a rock-shaft to. which said oscillatory slideways are pivotally secured, means for imparting motion to said rock-shaft in re verse directions to raise or lower said oscillatory slid'eways, and aconnection between said rock-shaft and feed mechanism adapted to correspondingly-accelerate or retard the feed, substantially as described.

3. In a gang-saw mill, the combination with i the feed-rolls, the oscillatory slideways and rock-arms-on a rock-shaft to which said slideways are pivotally secured, of thecombinaally, one side thereof forming a face-plate friction and the other being provided with opposite annular friction-faces, a frictionwheel between said annular faces-adapted to be moved into contact with either'and to be driven thereby in reverse directions, connection between said friction-wheel and the rockshaft and an edge friction-wheel in engage ment with the face-plate friction forming a variable-speed drive connection for the feed- 4. The combination in a gang-saw of the having shaft M provided with the lever N, the eccentric O withits red connected to lever It, all substantially asset forth.

5. The combination with the wheel I having opposite annular friction-faces and the oscillatory slideways pendulously secured to rock-arms ona rock-shaft; of the shaft G the hollow shaft II sleeved thereon having I the extension-arm h, the friction-wheel f journaled at the end of the arm it, between the ep- 1 posite annular faces of the wheeliha sprocketand-chain connection between said frictionwheel and the shaft G, a drive connection between said shaft and the rock-shaft, and

means for moving said friction-wheel f at will into contact with one orthe other-0f said annular faces, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

DANIEL CRANE. \Vit-nesses M. B. ODoennn'rr, O. F. BARTHEL. 

